CN102840821A - Displacement sensor - Google Patents
Displacement sensor Download PDFInfo
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- CN102840821A CN102840821A CN2011101735849A CN201110173584A CN102840821A CN 102840821 A CN102840821 A CN 102840821A CN 2011101735849 A CN2011101735849 A CN 2011101735849A CN 201110173584 A CN201110173584 A CN 201110173584A CN 102840821 A CN102840821 A CN 102840821A
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- circuit board
- magnetic core
- coil
- soft magnetic
- magneto strictive
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Abstract
The invention discloses a magnetostrictive displacement sensor. The magnetostrictive displacement sensor at least comprises a soft magnetic core, a circuit board and a coil around the soft magnetic core, wherein the soft magnetic core is riveted with the circuit board through the corresponding shape; the coil attached to the circuit board winds the soft magnetic core in a horizontal rectangle to form an inductor; the coil is separately wound in different layers of the circuit board; and in addition, the reverse winding between two adjacent plate layers is carried out, and thus the effect of reducing the electromagnetic interference is achieved.
Description
[technical field]
Present invention relates in general to a kind of magnetostrictive displacement sensor; Relate more specifically to utilize soft magnetic core; Circuit board realizes that the signal lotus root is closed and circuit board coil layout increase inductance, reduces volume, reduces the emission of electromagnetic interference (EMI) and the apparatus and method of inhibition noise and correlation effect.
[background technology]
Utilize magnetostrictive displacement sensor that Wiedemann (Wiedeman) effect and prestige Larry (Villary) effect of magnetostriction materials realize that absolute displacement measures at machinery at present, building, industry widespread uses such as lathe.Advantages such as magnetostrictive displacement sensor has high precision, high response, low sluggishness, high reliability, noncontact, the life-span is long, stability is high, easy for installation need not be demarcated again, need not periodic maintenance.
During magnetostrictive displacement sensor work, electronic signal and disposal system are issued mangneto waveguide steel wire driving pulse electric current, and this pulse current will produce a rotating magnetic field around the waveguide steel wire.Position magnet also produces a fixing magnetic field.According to the Widemanm effect, metal produces the waveguide distortion with its short time set, and it is flexible to make the waveguide steel wire produce magnetoelasticity, promptly forms a mangneto rotation wave.Mangneto rotation velocity of wave propagation is constant.Rotation wave is propagated to both sides with certain speed along the waveguide steel wire.When it passes to the ripple detecting device of waveguide steel wire one end, be converted into electric signal, pass to the time of ripple detecting device through measurement mangneto rotation wave from position magnet and just can confirm the distance between position magnet and the ripple detecting device.Like this, when two parts produce relative motion, just can confirm the position and the speed of unit under test through mangneto rotation wave displacement transducer.
Magnetostrictive displacement sensor relies in sum is the electronic devices and components that the feedback of electromagnetic signal is obtained metrical information.
Above-mentioned measurement scheme inevitably can receive the influence of space magnetic field and electromagnetic signal and produce electromagnetic interference (EMI) and the noise of not expecting, influences measuring accuracy and accuracy and job stability; And the general at present magnetic materials that adopts defectives such as also amount is heavy, and volume is big.Space magnetic field and electromagnetic signal can be derived from the outside of sensor with inner.For the electromagnetic interference (EMI) of sensor space outerpace magnetic field and electromagnetic signal, can solve with shielding and other technologies.But need find out a kind of effective scheme solution for electromagnetic interference (EMI) that is derived from sensor internal and noise.
Therefore be desirable to provide a kind of reduction magneto strictive sensor internal electromagnetic interference and noise and do not increase sensor weight again, cost, the system and method for size.Other desired characters of the present invention and characteristic will be under the situation of technical field that combines accompanying drawing and front and background technology, and it is obvious to become in detailed description from behind and the accompanying claims.
[summary of the invention]
The object of the invention provides a kind of magneto strictive sensor, and it utilizes soft magnetic core, and circuit board and circuit board coil layout method reduce electromagnetic interference (EMI) and noise, improve measurement stability.
According to the present invention, a kind of magneto strictive sensor is provided, comprising: a magnetic core, said magnetic core is processed by ferrite or other magnetostriction materials; One circuit board, said circuit board and magnetic core riveted, said circuit board are one or more layers; Coil, said coil adheres to circuit board.
According to one embodiment of the invention, said magnetic core is the E type, the F type, and the H type, " type, " type, [type is positioned in the corresponding riveted groove of circuit board.
According to one embodiment of the invention, said circuit board has and the corresponding riveted groove of core shapes, the coupled magnetic field signal, or realize the inductance serial or parallel connection.
According to one embodiment of the invention, said coil is the horizontal rectangular state and adheres to circuit board, and individual pen or many corrals are around soft magnetic core.
Said circuit board comprises ground floor at least, and it is positive that coil adheres to this layer circuit board around soft magnetic core horizontal rectangular state, and said coil adheres to this layer circuit board reverse side around soft magnetic core horizontal rectangular state, and with the front reverse around.
Said circuit board comprises the second layer at least, and said second layer board coil and said ground floor coil winding-direction are reverse.
Said circuit board also can comprise at least the three layer, and said three ply board coil and said second layer coil winding-direction are reverse.
Said circuit board also can comprise multilayer, and coil winding-direction is reverse between the said multilayer adjacent layer.
Compared with prior art, adopt the present invention's technical scheme, use soft magnetism to make the magnetic core of magnetostrictive displacement sensor, effectively guide and utilize the magnetic line of force, reduce device volume, weight reduces leakage flux; The present invention adopts given shape soft magnetic core, Stability Analysis of Structures, difficult drop-off; Separately coiling between the individual layer of the reverse coiling of the present invention or different flaggy can be eliminated or reduce internal electromagnetic and disturb and noise, reduces measuring error, improves and measures precision; The present invention can be according to the inductance value of different demands, through calculate change coil reach demand around the number of turns.
[description of drawings]
Accompanying drawing below hereinafter will combining is described the present invention, and wherein identical Reference numeral is represented components identical, wherein:
The front view of Fig. 1 first embodiment of the invention
Fig. 2 first embodiment of the invention attach view
The upward view of Fig. 3 first embodiment of the invention
The common mode interference figure of Fig. 4 second embodiment of the invention
The sectional view of Fig. 5 second embodiment of the invention
[embodiment]
In conjunction with content of the present invention embodiment once is provided:
Magneto strictive sensor of the present invention (hereinafter to be referred as sensor) enforcement one is for example shown in Figure 1, mainly comprises magnetic core 1, circuit board 2, coil 3.Magnetic core 1 is an E shape soft magnetism in the present embodiment, can with circuit board 2 tight riveteds, again with colloid adhesion, reinforce riveted, form effective magnetic field.Coil 3 is the horizontal rectangular shape and is evenly distributed on the circuit board, is looped around around the magnetic core 1.To the inductance of different demands is arranged, change inductance value through the number of turns that increases or reduce coil.The inductance value computing formula of single turn square coil is as follows:
L wherein: the inductance of rectangle inductance;
A, b: the length of square coil and wide;
R: the radius of winding wire;
U0: the magnetic permeability in the vacuum, U0=4 π 10-7 [H/m];
This formula condition of application is: a＞＞r; B＞＞r;
[0023] Fig. 2 joint 5 is connected the realization series connection with Fig. 3 joint 6, and Fig. 2 joint 5 is connected with joint 6 with joint 6 and Fig. 3 joint 5 realizes parallel connection.
[0024] Fig. 2 vertical view 2 be in the TOPS laminate coil 3 from joint 5 beginning in the direction of the clock, horizontal rectangular is evenly distributed on the circuit board, reaches joint 6, is connected to other modules; Fig. 3 upward view is that the coil 3 in the bottom flaggy begins by counterclockwise from joint 5, and horizontal rectangular is evenly distributed on the circuit board, reaches joint 6, is connected to other modules.Reverse coiling as shown in Figure 4 effectively suppresses common mode interference.
In conjunction with content of the present invention another embodiment is provided:
Magneto strictive sensor of the present invention (hereinafter to be referred as sensor) enforcement one is for example shown in Figure 5, and soft magnetic core 1 is arranged among this embodiment; Multilayer circuit board Layer1, layer2; Coil 3; Circuit board Layer1 goes up coil 3a, 3b, 3c, 3d; 3a is the CW coiling, and 3b is coiling counterclockwise, and 3c is the CW coiling; 3d is coiling counterclockwise, and soft magnetic core is positioned over hollow riveted position, forms an integral unit device; So form the magnetic circuit that interferes with each other, thereby reach the effect that reduces magnetic interference.
Claims (8)
1. a magnetostrictive displacement sensor is characterized in that, comprising:
Magnetic core, said magnetic core can be ferrite or other magnetostriction materials are processed;
Circuit board, said circuit board and magnetic core riveted;
Coil, said coil adheres to circuit board.
2. magneto strictive sensor as claimed in claim 1 is characterized in that, magnetic core places circuit board riveted groove.
3. magneto strictive sensor as claimed in claim 2 is characterized in that, magnetic core is the E type, F type, H type, " type, " type, [type etc.
4. magneto strictive sensor as claimed in claim 1 is characterized in that, said circuit board comprises:
The riveted groove, corresponding with core shapes, fixed magnetic core;
Coil is the horizontal rectangular state and adheres to circuit board, around soft magnetic core.
5. magneto strictive sensor as claimed in claim 4 is characterized in that said circuit board comprises at least one lamina.
6. magneto strictive sensor as claimed in claim 5 is characterized in that said circuit board comprises at least one lamina, and coil is the horizontal rectangular state around soft magnetic core and adheres to circuit board, and positive and negative direction of winding face is reverse.
7. magneto strictive sensor as claimed in claim 4 is characterized in that said circuit board comprises circuit board more than at least two layers or two layers.
8. magneto strictive sensor as claimed in claim 7 is characterized in that said circuit board comprises circuit board more than at least two layers or two layers, and coil is the horizontal rectangular state around soft magnetic core and adheres to circuit board, and adjacent plate direction of winding is reverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101735849A CN102840821A (en) | 2011-06-24 | 2011-06-24 | Displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101735849A CN102840821A (en) | 2011-06-24 | 2011-06-24 | Displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102840821A true CN102840821A (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101735849A Pending CN102840821A (en) | 2011-06-24 | 2011-06-24 | Displacement sensor |
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| Country | Link |
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| CN (1) | CN102840821A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441065A (en) * | 2016-11-24 | 2017-02-22 | 张红卫 | Displacement sensor for measuring movement of coil moveable magnetic core |
| CN106515990A (en) * | 2016-12-21 | 2017-03-22 | 深圳凯达通光电科技有限公司 | Electric bicycle of electromechanical field |
| CN106531402A (en) * | 2016-12-21 | 2017-03-22 | 深圳明创自控技术有限公司 | High-tension transformer cabinet used for electric power system |
| CN106516507A (en) * | 2016-12-21 | 2017-03-22 | 深圳智达机械技术有限公司 | Construction site environment-friendly box structure reliable in support |
| CN106703147A (en) * | 2016-12-21 | 2017-05-24 | 深圳智达机械技术有限公司 | Environment-friendly and energy-saving mobile toilet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043341U (en) * | 1988-12-15 | 1989-08-23 | 中国科学技术大学 | Microdisplacement transducer |
| JP2002013905A (en) * | 2000-06-30 | 2002-01-18 | Mitsutoyo Corp | Induction type position detector |
| DE10054308A1 (en) * | 2000-11-02 | 2002-06-13 | Conti Temic Microelectronic | Actuator for electromagnetic valve control has an arrangement for determination of actuator position without risk of displacement of the signal generator or demagnetization of a permanent magnet |
| CN101651008A (en) * | 2008-05-28 | 2010-02-17 | 弗莱克斯电子有限责任公司 | Inductor element |
-
2011
- 2011-06-24 CN CN2011101735849A patent/CN102840821A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043341U (en) * | 1988-12-15 | 1989-08-23 | 中国科学技术大学 | Microdisplacement transducer |
| JP2002013905A (en) * | 2000-06-30 | 2002-01-18 | Mitsutoyo Corp | Induction type position detector |
| DE10054308A1 (en) * | 2000-11-02 | 2002-06-13 | Conti Temic Microelectronic | Actuator for electromagnetic valve control has an arrangement for determination of actuator position without risk of displacement of the signal generator or demagnetization of a permanent magnet |
| CN101651008A (en) * | 2008-05-28 | 2010-02-17 | 弗莱克斯电子有限责任公司 | Inductor element |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441065A (en) * | 2016-11-24 | 2017-02-22 | 张红卫 | Displacement sensor for measuring movement of coil moveable magnetic core |
| CN106441065B (en) * | 2016-11-24 | 2018-12-14 | 嘉兴学院 | A kind of displacement sensor moved for measuring coil movable magnetic core |
| CN106515990A (en) * | 2016-12-21 | 2017-03-22 | 深圳凯达通光电科技有限公司 | Electric bicycle of electromechanical field |
| CN106531402A (en) * | 2016-12-21 | 2017-03-22 | 深圳明创自控技术有限公司 | High-tension transformer cabinet used for electric power system |
| CN106516507A (en) * | 2016-12-21 | 2017-03-22 | 深圳智达机械技术有限公司 | Construction site environment-friendly box structure reliable in support |
| CN106703147A (en) * | 2016-12-21 | 2017-05-24 | 深圳智达机械技术有限公司 | Environment-friendly and energy-saving mobile toilet |
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Application publication date: 20121226 |